<template>
  <div class="cart">
    <Header></Header>
    <div class="cart_info">
      <div class="cart_title">
        <span class="text">我的购物车</span>
        <span class="total">共{{course_list.length}}门课程</span>
      </div>
      <div class="cart_table">
        <div class="cart_head_row">
          <span class="doing_row"></span>
          <span class="course_row">课程</span>
          <span class="expire_row">有效期</span>
          <span class="price_row">单价</span>
          <span class="do_more">操作</span>
        </div>
        <div class="cart_course_list">
          <CartItem :token="token"
                    :course="course"
                    :key="key"
                    :course_key="key"
                    v-for="course,key in course_list"
                    @del_cart="del_cart"
                    @calc_total="calc_total"
          ></CartItem>
        </div>
        <div class="cart_footer_row">
          <span class="cart_select"><label> <el-checkbox v-model="checked"></el-checkbox><span>全选</span></label></span>
          <span class="cart_delete"><i class="el-icon-delete"></i> <span>删除</span></span>
          <span class="goto_pay"><router-link to="/buy">去结算</router-link></span>
          <span class="cart_total">总计：¥{{total.toFixed(2)}}</span>
        </div>
      </div>
    </div>
    <Footer></Footer>
  </div>
</template>

<script>
  import Header from "./common/Header"
  import Footer from "./common/Footer"
  import CartItem from "./common/CartItem"

  export default {
    name: "Cart",
    data() {
      return {
        checked: false,
        token: "",
        course_list: [],    // 购物车中商品的信息
        total: 0,
      }
    },
    created() {
      // 获取token
      this.token = this.$settings.token();

      // 验证用户是否登录
      this.check_user_login();

    },
    methods: {
      del_cart(course_key) {
        // 删除子组件
        this.course_list.pop(course_key)
        this.calc_total()

      },
      get_cart() {
        // 获取购物车数据

        this.$axios.get(`${this.$settings.Host}/cart`, {
          headers: {
            Authorization: 'jwt ' + this.token
          }
        }).then(response => {
          this.course_list = response.data;
          // 计算总价格
          this.calc_total()
        }).catch(error => {
          this.$message.error('购物车信息获取失败！')
        })
      },
      check_user_login() {
        // 验证用户是否登录
        if (!this.token) {
          this.$confirm('对不起，您尚未登录请登录后继续操作, 是否继续?', '路飞学城', {
            confirmButtonText: '登录',
            cancelButtonText: '返回上一页',
            type: 'error'
          }).then(() => {
            this.$router.push("/login");
          }).catch(() => {
            this.$router.go(-1);
          });
          return false; // 阻止代码继续往下执行
        }
        this.get_cart()
      },
      calc_total() {
        let total = 0;
        for (let course of this.course_list) {
          if (course.selected) {
            total += parseFloat(course.price)
          }
        }
        this.total = total
      },

    },
    components: {
      Header,
      Footer,
      CartItem,
    }
  }
</script>

<style scoped>
  .cart_info {
    width: 1200px;
    margin: 0 auto 200px;
  }

  .cart_title {
    margin: 25px 0;
  }

  .cart_title .text {
    font-size: 18px;
    color: #666;
  }

  .cart_title .total {
    font-size: 12px;
    color: #d0d0d0;
  }

  .cart_table {
    width: 1170px;
  }

  .cart_table .cart_head_row {
    background: #F7F7F7;
    width: 100%;
    height: 80px;
    line-height: 80px;
    padding-right: 30px;
  }

  .cart_table .cart_head_row::after {
    content: "";
    display: block;
    clear: both;
  }

  .cart_table .cart_head_row .doing_row,
  .cart_table .cart_head_row .course_row,
  .cart_table .cart_head_row .expire_row,
  .cart_table .cart_head_row .price_row,
  .cart_table .cart_head_row .do_more {
    padding-left: 10px;
    height: 80px;
    float: left;
  }

  .cart_table .cart_head_row .doing_row {
    width: 78px;
  }

  .cart_table .cart_head_row .course_row {
    width: 530px;
  }

  .cart_table .cart_head_row .expire_row {
    width: 188px;
  }

  .cart_table .cart_head_row .price_row {
    width: 162px;
  }

  .cart_table .cart_head_row .do_more {
    width: 162px;
  }

  .cart_footer_row {
    padding-left: 30px;
    background: #F7F7F7;
    width: 100%;
    height: 80px;
    line-height: 80px;
  }

  .cart_footer_row .cart_select span {
    font-size: 18px;
    margin-left: 15px;
    color: #666;
  }

  .cart_footer_row .cart_delete {
    margin-left: 58px;
    cursor: pointer;
  }

  .cart_delete .el-icon-delete {
    font-size: 18px;
  }

  .cart_delete span {
    margin-left: 15px;
    cursor: pointer;
    font-size: 18px;
    color: #666;
  }

  .cart_total {
    float: right;
    margin-right: 62px;
    font-size: 18px;
    color: #666;
  }

  .goto_pay {
    float: right;
    width: 159px;
    height: 80px;
    outline: none;
    border: none;
    background: #ffc210;
    font-size: 18px;
    color: #fff;
    text-align: center;
    cursor: pointer;
  }
</style>
